Top

A top is a toy designed to be spun rapidly on the ground, the motion of which causes it to remain precisely balanced on its tip because of inertia. Such toys have existed since antiquity. Traditionally tops were constructed of wood, sometimes with an iron tip, and would be set in motion by aid of a string or rope coiled around its axis which, when pulled quickly, caused a rapid unwinding that would set the top in motion. Today they are often built of plastic, and modern materials and manufacturing processes allow tops to be constructed with such precise balance that they can be set in motion by a simple twist of the fingers and twirl of the wrist without need for string or rope.

Characteristics

The motion of a top is produced in the most simple forms by twirling the stem using the fingers. More sophisticated tops are spun by holding the axis firmly while pulling a string or twisting a stick or pushing an auger. In the kinds with an auger, an internal weight rotates, producing an overall circular motion. Some tops can be thrown, while firmly grasping a string that had been tightly wound around the stem, and the centrifugal force generated by the unwinding motion of the string will set them spinning upon touching ground.

Top (mathematics)

For finite-dimensional k-algebras (k a field), if rad(M) denotes the intersection of all proper maximal submodules of M (the radical of the module), then the top of M is M/rad(M). In the case of local rings with maximal ideal P, the top of M is M/PM. In general if R is a semilocal ring (=semi-artinian ring), that is, if R/Rad(R) is an Artinian ring, where Rad(R) is the Jacobson radical of R, then M/rad(M) is a semisimple module and is the top of M. This includes the cases of local rings and finite dimensional algebras over fields.

References

Top (clothing)

A top is clothing that covers at least the chest, but which usually covers most of the upper human body between the neck and the waistline. The bottom of tops can be as short as mid-torso, or as long as mid-thigh. Men's tops are generally paired with pants, and women's with pants or skirts. Common types of tops are t-shirts, blouses and shirts.

Design

The neckline is the highest line of the top, and may be as high as a head-covering hood, or as low as the waistline or bottom hem of the top. A top may be worn loose or tight around the bust or waist, and may have sleeves or shoulder straps, spaghetti straps (noodle straps), or may be strapless. The back may be covered or bare. Tops may have straps around the waist or neck, or over the shoulders.

Types

Neck styles

See also

References

External links

Half dollar

The term Half dollar may refer to a half-unit of several currencies that are named "dollar". Normally, $1 is divided into 100 cents, so a half dollar is equal to 50 cents. Coins and/or banknotes of that amount are as such denominated at a value of 50 cents. More than a dozen countries are known to have their own unique dollar currency, out of these not all use the 50 cent piece or half dollar.

References

Five pounds (British coin)

The Britishfive pound (£5) coin is a commemorative denomination of the pound sterling. Its obverse has featured the profile of Queen Elizabeth II since the coin’s introduction in 1990. Two different portraits of the Queen have graced the coin, with the latest design by Ian Rank-Broadley being introduced in 1998. The coin has no standard reverse, which is altered each year to commemorate important events. Variant obverses have also been used on occasion.

The coin is a continuation of the crown, which after decimalisation become the commemorative twenty-five pence coin. The twenty-five pence was discontinued in 1981 after creating a large coin with such small value became prohibitively expensive. The five pound coin shares the same dimensions as the twenty-five pence coin but has a value twenty times greater.

Five pound coins are legal tender but are intended as souvenirs and are rarely seen in circulation. The coins are sold by the Royal Mint at face value and also, with presentation folders, at a premium to that face value. The 2010 coins, with such folders, were sold for £9.95 each.

₹125 coin

A ₹125 commemorative coin was released by the Government of India on 4 September 2015. The coin commemorates India's first vice-president and second president, Dr. Sarvepalli Radhakrishnan. In an official function on the eve of National Teachers' Day,Prime MinisterNarendra Modi released the coin along with a separate ₹10 coin. Both coins are stamped with a picture of Dr.Radhakrishnan on their obverses. The ₹125 coin is not meant for general circulation.